Conversion from string to type Double is not valid

moji

I want to add a value to a field that has value from before. My code is:

Dim Credits As Integer = Int64.Parse(FinalPay.ToString)
Dim cmd As New SqlCommand("Update Users Set Credit=Credit+" + Credits + 
                          " Where Email ='" + UserEmail + "'", con)

But I get an error that says:

"Conversion from string to double is not valid"

sapi
Dim Credits As Integer = Int64.Parse(FinalPay.ToString)
Dim cmd As New SqlCommand("Update Users Set Credit=Credit+" & Credits & 
                                                " Where Email ='" & UserEmail & "'", con)

When you want to concat a string in vb you want to use the "&" operator

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